Your Rogue is using a resilience/stamina gem as a dagger?
Joking aside, I'm assuming you meant Broken Stalactite, and if so, I can assure you that going from a 130DPS Dagger to a 143DPS one does not result in a 175% damage increase on your partner's mutilates.
It makes a big enough difference from what I've been told... going from stalactite to naxx daggers. :/
I'm not saying we are losing due to his daggers, we both agree we have to work on our strat and play better, but we also think if he can get better weapons it will help us execute our strats far better and prevent fails that are due solely to 'almost' having enough burst. So don't get me wrong, I'm not saying our fail is gear based.
Except when we lost to a ret paladin with betrayer of humanity. That totally fken was -.-
Going to try and get back into 2s tomorrow, had over a week off and trashed the rating to get a friend points. We reached 1705 with much worse gear a cpl of weeks ago, so hoping we do alright now - we've discussed strats, I've improved some gear pieces. And gone back to frost.
Also instead of just nuking, we're playing defensively at the start after our initial burst, if they survive it they always go offensive and blow everything, so we kite/cc through that, try to heal up, and re-open. <- a result of now being frost, not arcane. Arcane was epic fail (not in terms of results, in terms of the zero skill cap and boredom).